Under seat storage box



FIG. 1 is a front and top perspective view of an under seat storage box, showing our new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the under seat storage box that form no part of the claimed design. 

CLAIM The ornamental design for an under seat storage box, as shown and described. 